i have some form of audio device playing a white (brown) noise file that fades in and out over 15 minutes. cam be found on the internet!

sometimes i also have music playing.

ideally it is a regular passive speaker, hooked up to all the good shit. at one time those speakers were installed in the ceiling, but those days are gone.

right now it's a W king Bluetooth speaker that i normally use while traveling.

not the greatest but gets the job done.

in a pinch, even the phone speaker will do.

sorry for rambling and not really answering the question!